// 分数类
class Fraction
{
  private:
    int a;
    int b;

    int Fraction::divisor(int p, int q);
  public:
    Fraction();
    Fraction(int a, int b);
    Fraction(Fraction &c);

    void set(int a, int b);
    void show();
    Fraction add(Fraction b);
};


